Taking this view of man, that he is an unfolding spiritual consciousness, we find that he creates for himself, as he unfolds, more highly organised bodies of matter, so that the double growth is going on in every one of us, higher stages of unfolding consciousness, subtler bodies of matter by which that consciousness can express itself clearly and definitely; to every change in consciousness a vibration in matter answering; to every vibration in matter a change in consciousness responding; so that there are side by side the unfolding of the Spirit and the development of a more delicate and more highly organised body, the difference showing itself in the nervous system as well as in the mere outer configuration of the body. Glance again at that fourth Race, study its nervous system, and you will find it very different from your own. While like your own in outer configuration, while the differences between the brain and the general distribution of the nerves to the body are not great, if you go into the question of the organisation of that nervous system you will find that an enormous gulf divides the fourth and the fifth great Races of mankind. Again, if you want a proof, look at the amount of pain or the amount of physical injury which can be endured, say, by the Chinaman, in comparison with what you can bear. Notice that an enormous laceration inflicted on the body of the Chinaman leaves him ready to recover rapidly, while a similar injury to you would kill you by nervous shock. It is not the question of the mutilation—that and the loss of blood might be the same in each—but the fifth Race man dies from nervous shock, where the fourth Race man with the coarser nervous system is able to recover, is able to re-establish the nervous equilibrium.